Gas leakage detection method based on compound internet of things (IoT) and IoT system

ABSTRACT

The present invention relates to the field of Internet of Things (IoT), and provides a gas leakage detection method based on a compound IoT and an IoT system. According to the gas leakage detection method based on the compound IoT and the IoT system provided by the present invention, whether a gas pipeline of a user has gas leakage or not is judged via a user participation manner, the judgment manner is intelligent, the judgment result is accurate and thus the gas safety of the user is guaranteed.

TECHNICAL FIELD

The present invention relates to the field of Internet of Things (IoT),and in particular to a gas leakage detection method based on a compoundIoT and an IoT system.

BACKGROUND

In home safety, the safe use of the gas is a top priority. Nowadays,there are many gas leakage safety accidents almost every year in theworld, which results in that the safety for lives and properties ofpeople cannot be guaranteed. In order to take an effective measure aftergas leakage, many manners are adopted by the people to detect and judgethe gas leakage. At present, the detection of the gas leakage mainlyrelies on an alarm to detect a concentration of a combustible gas arounda gas pipeline, thereby judging whether the gas is leaked or not. Withsuch a manner, the false judgment (misled by other combustible gases)and the omitted judgment (the distance between an installation positionof the alarm and a gas leakage position is far) often happen, and as aresult, the accuracy of the leakage detection is poor, the potentialsafety hazard is caused, and the use experience feeling of a user ispoor.

SUMMARY OF THE INVENTION

In view of this, an objective of the present invention to provide a gasleakage detection method based on a compound IoT and an IoT system toprovide an accurate gas leakage detection mechanism.

To this end, the technical solutions adopted by the present inventionare as follows:

According to a first aspect, the present invention provides a gasleakage detection method based on a compound IoT; the method is appliedto an IoT system; the IoT system includes a user platform, a managementplatform, an object platform, a plurality of sensor networksub-platforms and service sub-platforms; the object platform includes agas meter; the service sub-platforms include at least one of a gascompany service sub-platform, a government service sub-platform or asocial operator service sub-platform; and the method includes: sending,by the user platform, a detection command to a service sub-platform,where the detection command includes a time period; sending, by theservice sub-platform, the detection command to the management platform;sending, by the management platform, a detection instruction to the gasmeter via at least one of the plurality of sensor network sub-platformsaccording to the detection command; in response to the detectioninstruction, sending, by the gas meter, gas data to the managementplatform via the sensor network sub-platform at a preset time intervalwithin the time period; judging, by the management platform, whether thegas data uploaded by the gas meter changes or not, and when the gas datachanges, judging, by the management platform, whether to send a valveclosing instruction to the gas meter or not via at least one of theplurality of sensor network sub-platforms; and when receiving the valveclosing instruction, closing, by the gas meter, a valve in response tothe valve closing instruction.

Further, the service sub-platforms include at least the gas companyservice sub-platform and the social operator service sub-platform; andthe step of when the gas data changes, judging, by the managementplatform, whether to send a valve closing instruction to the gas meteror not via at least one of the plurality of sensor network sub-platformsincludes: when the time at which the gas data changes falls within apreset time range, sending, by the management platform, the valveclosing instruction to the gas meter via at least one of the pluralityof sensor network sub-platforms; and sending, by the managementplatform, prompt information to both the gas company servicesub-platform and the social operator service sub-platform.

Further, the service sub-platforms include at least the gas companyservice sub-platform and the social operator service sub-platform; andthe step of judging, by the management platform, whether to send a valveclosing instruction to the gas meter or not via at least one of theplurality of sensor network sub-platforms includes: judging, by themanagement platform, whether or not the amount of change in the gas datais greater than a preset threshold; if the amount of change in the gasdata is smaller than the threshold, sending, by the management platform,query information to the user platform via a service sub-platform toquery whether a user has used the gas or not, and judging, according toa response of the user platform to the query information, whether tosend the valve closing instruction to the gas meter or not via at leastone of the plurality of sensor network sub-platforms; if the amount ofchange in the gas data is greater than the threshold, sending, by themanagement platform, the valve closing instruction to the gas meter viaat least one of the plurality of sensor network sub-platforms; and whenthe management platform sends the valve closing instruction to the gasmeter via at least one of the plurality of sensor network sub-platforms,sending, by the management platform, the prompt information to both thegas company service sub-platform and the social operator servicesub-platform.

Further, when the response of the user platform to the query informationis that the gas hasn't been used, the management platform sends thevalve closing instruction to the gas meter via at least one of theplurality of sensor network sub-platforms.

Further, if the user platform does not make a response to the queryinformation within a preset duration, the management platform sends thevalve closing instruction to the gas meter via at least one of theplurality of sensor network sub-platforms.

Further, the service sub-platforms include at least the gas companyservice sub-platform and the social operator service sub-platform; andthe step of judging, by the management platform, whether to send a valveclosing instruction to the gas meter or not via at least one of theplurality of sensor network sub-platforms includes: judging, by themanagement platform, whether the change of the gas data is continuous ornot within a preset observation duration; if the change of the gas datais continuous, sending, by the management platform, the valve closinginstruction to the gas meter via at least one of the plurality of sensornetwork sub-platforms; and sending, by the management platform, theprompt information to both the gas company service sub-platform and thesocial operator service sub-platform.

Further, if the change of the data of the gas meter is not continuouswithin the preset observation duration, the management platform does notsend the valve closing instruction.

According to a second aspect, the present invention provides an IoTsystem; the IoT system includes a user platform, a management platform,an object platform, a plurality of sensor network sub-platforms andservice sub-platforms; the object platform is communicatively connectedwith the management platform via at least one of the plurality of sensornetwork sub-platforms; the management platform is communicativelyconnected with the service sub-platforms; the service sub-platforms arecommunicatively connected with the user platform; the object platformincludes a gas meter; the service sub-platforms include at least one ofa gas company service sub-platform, a government service sub-platform ora social operator service sub-platform; the user platform is configuredto send a detection command to a service sub-platform, where thedetection command includes a time period; each of the servicesub-platforms is configured to send the detection command to themanagement platform; the management platform is configured to send adetection instruction to the gas meter via at least one of the pluralityof sensor network sub-platforms according to the detection command; thegas meter is configured to send, in response to the detectioninstruction, gas data to the management platform via the sensor networksub-platform at a preset time interval within the time period; themanagement platform is configured to judge whether the gas data uploadedby the gas meter changes or not, and when the gas data changes, themanagement platform judges whether to send a valve closing instructionto the gas meter or not via at least one of the plurality of sensornetwork sub-platforms; and when receiving the valve closing instruction,the gas meter closes a valve in response to the valve closinginstruction.

Further, the service sub-platforms include at least the gas companyservice sub-platform and the social operator service sub-platform, andwhen the time at which the gas data changes falls within a preset timerange, the management platform sends the valve closing instruction tothe gas meter via at least one of the plurality of sensor networksub-platforms, and the management platform sends prompt information toboth the gas company service sub-platform and the social operatorservice sub-platform.

Further, the service sub-platforms include at least the gas companyservice sub-platform and the social operator service sub-platform; andthat the management platform judges whether to send a valve closinginstruction to the gas meter or not via at least one of the plurality ofsensor network sub-platforms includes: the management platform judgeswhether or not the amount of change in the gas data is greater than apreset threshold; if the amount of change in the gas data is smallerthan the threshold, the management platform sends query information tothe user platform via a service sub-platform to query whether a user hasused the gas or not, and judges, according to a response of the userplatform to the query information, whether to send the valve closinginstruction to the gas meter or not via at least one of the plurality ofsensor network sub-platforms; if the amount of change in the gas data isgreater than the threshold, the management platform sends the valveclosing instruction to the gas meter via at least one of the pluralityof sensor network sub-platforms; and when the management platform sendsthe valve closing instruction to the gas meter via at least one of theplurality of sensor network sub-platforms, the management platform sendsthe prompt information to both the gas company service sub-platform andthe social operator service sub-platform.

Further, when the response of the user platform to the query informationis that the gas hasn't been used, the management platform sends thevalve closing instruction to the gas meter via at least one of theplurality of sensor network sub-platforms.

Further, if the user platform does not make a response to the queryinformation within a preset duration, the management platform sends thevalve closing instruction to the gas meter via at least one of theplurality of sensor network sub-platforms.

Further, the service sub-platforms include at least the gas companyservice sub-platform and the social operator service sub-platform; andthat the management platform judges whether to send a valve closinginstruction to the gas meter or not via at least one of the plurality ofsensor network sub-platforms includes: the management platform judgeswhether the change of the data of the gas meter is continuous or notwithin a preset observation duration; if the change of the data of thegas meter is continuous, the management platform sends the valve closinginstruction to the gas meter via at least one of the plurality of sensornetwork sub-platforms; and the management platform sends the promptinformation to both the gas company service sub-platform and the socialoperator service sub-platform.

Further, if the change of the data of the gas meter is not continuouswithin the preset observation duration, the management platform does notsend the valve closing instruction.

The present invention provides a gas leakage detection method based on acompound IoT and an IoT system. The method is applied to the IoT system;the IoT system includes a user platform, a management platform, anobject platform, a plurality of sensor network sub-platforms and servicesub-platforms; the object platform includes a gas meter; and the servicesub-platforms include at least one of a gas company servicesub-platform, a government service sub-platform or a social operatorservice sub-platform. The method includes: sending, by the userplatform, a detection command to a service sub-platform, where thedetection command includes a time period; sending, by the servicesub-platform, the detection command to the management platform; sending,by the management platform, a detection instruction to the gas meter viaat least one of the plurality of sensor network sub-platforms accordingto the detection command; in response to the detection instruction,sending, by the gas meter, gas data to the management platform via thesensor network sub-platform at a preset time interval within the timeperiod; judging, by the management platform, whether the gas datauploaded by the gas meter changes or not, and when the gas data changes,judging, by the management platform, whether to send a valve closinginstruction to the gas meter or not via at least one of the plurality ofsensor network sub-platforms; and when receiving the valve closinginstruction, closing, by the gas meter, a valve in response to the valveclosing instruction. According to the gas leakage detection method basedon the compound IoT and the IoT system provided by the invention,whether a gas pipeline of a user has gas leakage or not is remotelymonitored and is judged via a user participation manner, the judgmentmanner is intelligent, the judgment result is accurate and thus the gassafety of the user is guaranteed.

To make the above objectives, characteristics and advantages of thepresent invention more apparent and understandable, preferredembodiments are set forth hereinafter and are described below in detailin combination with accompanying drawings.

BRIEF DESCRIPTION OF DRAWINGS

To make the objectives, technical solutions and advantages of theembodiments of the present invention clearer, a clear and completedescription of the technical solutions in the present invention will begiven below in combination with the accompanying drawings in theembodiments of the present invention. Apparently, the embodimentsdescribed below are a part, but not all, of the embodiments of thepresent invention. Generally, a component, described and illustrated inthe accompanying drawings, in the embodiments of the present inventionmay be disposed and designed in various different configurations.Therefore, the following detailed description concerning the embodimentsof the present invention and provided in the accompanying drawings isnot intended to limit a claimed scope of the present invention, butmerely represents selected embodiments of the present invention. All ofthe other embodiments, obtained by a person of ordinary skill in the artbased on the embodiments of the present invention without any inventiveefforts, fall into the protection scope of the present invention.

FIG. 1 illustrates a compositional schematic diagram of an IoT systemprovided by an embodiment of the present invention;

FIG. 2 illustrates a flowchart of a gas leakage detection method basedon a compound IoT provided by an embodiment of the present invention;

FIG. 3 illustrates a schematic diagram of an application scenario of agas leakage detection method based on a compound IoT provided by anembodiment of the present invention; and

FIG. 4 illustrates a schematic diagram of an application scenario of agas leakage detection method based on a compound IoT provided by anembodiment of the present invention.

Numerals in the drawings: 100—IoT system; 10—user platform; 20—servicesub-platform; 30—management platform; 40—sensor network sub-platform;50—object sub-platform.

DESCRIPTION OF EMBODIMENTS

A clear and complete description of the technical solutions in thepresent invention will be given below in combination with theaccompanying drawings in the embodiments of the present invention.Apparently, the embodiments described below are a part, but not all, ofthe embodiments of the present invention. Generally, a component,described and illustrated in the accompanying drawings, in theembodiments of the present invention may be disposed and designed invarious different configurations. Therefore, the following detaileddescription concerning the embodiments of the present invention andprovided in the accompanying drawings is not intended to limit a claimedscope of the present invention, but merely represents selectedembodiments of the present invention. All of the other embodiments,obtained by those skilled in the art based on the embodiments of thepresent invention without any inventive efforts, fall into theprotection scope of the present invention.

Referring to FIG. 1, a gas leakage detection method based on a compoundIoT provided by an embodiment of the present invention is applied to anIoT system 100. The IoT system 100 includes a user platform 10, aplurality of service sub-platforms 20, a management platform 30, aplurality of sensor network sub-platforms 40 and an object platform 50.Herein, the object platform 10 may be communicatively connected with themanagement platform 30 via any one or more of the plurality of sensornetwork sub-platforms 40 to send data of the object platform 50 to themanagement platform 30, or receive a signal sent by the managementplatform 30. The management platform 30 is communicatively connectedwith the plurality of service sub-platforms 20. In this embodiment, theplurality of service sub-platforms 20 may include at least one of a gascompany service sub-platform, a government service sub-platform or asocial operator service sub-platform. Each of the service sub-platforms20 is communicatively connected with the user platform 10, and isconfigured to receive information sent by the user platform 10, forwardthe information to the management platform 30, and push information sentby the management platform 30 to the user platform 10. The managementplatform 30 and the service sub-platforms 20 each may be a server. Theobject platform 50 includes a gas meter. The gas leakage detectionmethod based on the compound IoT provided by the embodiment of thepresent invention is applied to detecting whether a gas pipeline of auser leaks or not.

Referring to FIG. 2, the gas leakage detection method based on thecompound IoT includes the following steps:

Step S1, a user platform sends a detection command to a servicesub-platform, where the detection command includes a time period.

In this embodiment, the user platform 10 may be a universal electronicdevice such as a Personal Computer (PC), a smartphone, a tabletcomputer, a Personal Digital Assistant (PDA), a Mobile Internet Device(MID), and the like. With a smartphone as an example, as shown in FIG.3, after a user inputs a time period on the mobile phone and taps OK,the smartphone sends a detection command to a service sub-platform 20.Preferably, the service sub-platform 20 is a gas company servicesub-platform. The detection command sent by the smartphone includes thetime period set by the user, which indicates that the user will not usethe gas within the time period. It is easily understood that the lengthof the time period may be freely set, and may be, for example, a timeperiod of a day, and may also be a time period of a month or a timeperiod of a year, which is not limited by this embodiment thereto. Forexample, in the figure, the time period set by the user is at night, andin this duration, the user may be in a sleep state and the gas is notused. In other embodiments, if the user needs to go out, a longer timeperiod may be set, such as from July 1 to August 1.

Step S2, the service sub-platform sends the detection command to amanagement platform.

In this embodiment, the gas company service sub-platform forwards thedetection command to the management platform 30 to be processed by themanagement platform 30.

Step S3, the management platform sends a detection instruction to a gasmeter via at least one of a plurality of sensor network sub-platformsaccording to the detection command.

In this embodiment, the sensor network sub-platforms 40 each may be agateway. The management platform 30 communicates with the gas meter viaa sensor network sub-platform 40. The management platform 30 generates acorresponding detection instruction according to the detection command.It is easily understood that the detection instruction includes the timeperiod set by the user.

Step S4, the gas meter sends, in response to the detection instruction,gas data to the management platform via the sensor network sub-platformat a preset time interval within the time period.

The preset time interval may be determined based on the length of thetime period. For example, when the length of the time period is short,the time interval may be set to be intensive, e.g., if the length of thetime period is 8 hours, the time interval may be set to half an hour,i.e., the gas meter sends the gas data to the management platform 30every half an hour; and when the length of the time period is long, thetime interval may be set to be sparse, e.g., if the length of the timeperiod is one month, the time interval may be set to 2 hours, i.e., thegas meter sends the gas data to the management platform 30 every twohours. In order to ensure the timely and accurate transmission of thegas data, the plurality of sensor network sub-platforms 40 are providedin this embodiment, so that when a sensor network sub-platform 40 isfaulty, the gas data may be continuously transmitted via other standbysensor network sub-platforms 40.

Step S5, the management platform judges whether the gas data uploaded bythe gas meter changes or not.

When the gas data uploaded by the gas meter is different from theprevious gas data uploaded by the gas meter, it is judged by themanagement platform 30 that the gas data changes.

Step S6, when the gas data changes, the management platform judgeswhether to send a valve closing instruction to the gas meter via atleast one of the plurality of sensor network sub-platforms.

Since it is agreed in advance that after the user platform 10 sends thedetection command, the gas is no longer used by the user within the timeperiod included in the detection command, if the gas data changes in thetime period, it is generally understood that a gas pipeline of the userleaks. In this case, it is necessary to close a valve of the gas meterof the user to prevent an accident. However, it is not excluded that thegas data changes due to some accidental conditions, e.g., the user doesnot comply with the previous agreement, the gas is used in the set timeperiod, or an error occurs in a sensor of the gas meter. Therefore, whenthe management platform 30 judges that the gas data changes, it isnecessary to judge whether the change of the gas data is caused by thegas leakage or not, thereby judging whether the valve of the gas meterneeds to be closed or not.

The manner in which the management platform 30 judges whether the valveclosing instruction needs to be sent or not is described below.

When the time at which the gas data changes falls within the preset timerange, the management platform 30 sends the valve closing instruction tothe gas meter via at least one of the plurality of sensor networksub-platforms 40. The preset time range described herein may be setfreely as required, and may be, for example, set to the time at whichthe user sleeps. The perception is reduced when the user sleeps, so inorder to protect the safety of the user, the management platform 30sends the valve closing instruction to the gas meter via the sensornetwork sub-platform 40 no matter what causes the change of the gasdata. In this example, the service sub-platforms 20 include at least thegas company service sub-platform and the social operator servicesub-platform. The management platform 30 sends prompt information toboth the gas company service sub-platform and the social operatorservice sub-platform. The prompt information is sent to the gas companyservice sub-platform, so that a staff of a gas company can check andrectify the gas leakage after knowing the situation. The social operatorservice sub-platform may be a server of the responsible unit (propertymanagement center) of an area (residence community) where the user islocated. The prompt information is sent to the social operator servicesub-platform, so that the responsible unit (property management center)can confirm the safety of the user and make arrangement for maintenance.

As another implementation manner, when the gas data changes, themanagement platform 30 judges whether or not the amount of change in thegas data is greater than a preset threshold. The threshold does notaffect the normal life and life safety of the user, and may be set basedon a residence area of the user. If the amount of change in the gas datais smaller than the threshold, the management platform 30 sends queryinformation to the user platform 10 via a service sub-platform 20 toquery whether the user has used the gas or not, and judges, according toa response of the user platform to the query information, whether tosend the valve closing instruction to the gas meter or not via at leastone of the plurality of sensor network sub-platforms 40. As shown inFIG. 4, after the user platform 10 receives the query information, theinterface shown in the figure may be generated to ask whether the userhas used the gas or not. If the user taps “Yes”, it is indicated thatthe user has used the gas. If the user taps “No”, it is indicated thatthe user hasn't used the gas. If the user taps “No”, it is indicatedthat the user hasn't used the gas within the time period. However, thegas data changes, and the management platform 30 judges that the gaspipeline of the user leaks. In this case, the management platform 30sends the valve closing instruction to the gas meter via the at leastone of the plurality of sensor network sub-platforms 40. If the usertaps “Yes”, it is indicated that the user has used the gas within thetime period, and the management platform 30 cancels the previousmonitoring data and restarts to receive and analyze the gas data. If theamount of change in the gas data is greater than the threshold and thusthe personal safety of the user may be affected, the management platform30 sends the valve closing instruction to the gas meter via at least oneof the plurality of sensor network sub-platforms. At the same time, themanagement platform 30 sends the prompt information to both the gascompany service sub-platform and the social operator servicesub-platform.

If the user platform 10 does not make a response to the queryinformation within a preset duration, it may be indicated that the queryinformation is not read by the user. In order to ensure the personalsafety of the user, the management platform 30 sends the valve closinginstruction to the gas meter via at least one of multiple sensor networksub-platforms 40. At the same time, the management platform 30 sends theprompt information to both the gas company service sub-platform and thesocial operator service sub-platform.

As another implementation manner, when the gas data changes, themanagement platform 30 judges whether the change of the gas data iscontinuous or not within a preset observation duration, and if yes, themanagement platform 30 sends the valve closing instruction to the gasmeter via at least one of the plurality of sensor network sub-platforms40. The management platform 30 sends the prompt information to both thegas company service sub-platform and the social operator servicesub-platform. Because gas leakage is a slow and continuous process, inthis embodiment, whether the change of gas data is continuous or notwithin the observation duration is judged, and if so, it is indicatedthat there is gas leakage. In order to ensure the accuracy, whether ornot the amount of change in the gas data in a unit time is smaller thana preset amount of change may further be judged in practicalapplication. If the amount of change in the gas data in the unit time issmaller than the preset amount of change and the change is continuous,it may be judged that there is gas leakage. It is easily understood thatif the change of the data of the gas meter is not continuous within thepreset observation duration, the management platform 30 does not sendthe valve closing instruction.

The above-described manner in which the management platform 30 judgeswhether to send the valve closing instruction or not is merely anexample of the embodiment of the present invention. In otherembodiments, it may be judged in other judgment manners, which is notlimited by the present invention thereto.

Step S7, when receiving the valve closing instruction, the gas metercloses a valve in response to the valve closing instruction, so as toensure the safety of a user.

In conclusion, the present invention provides a gas leakage detectionmethod based on a compound IoT and an IoT system. The method is appliedto the IoT system; the IoT system includes a user platform, a managementplatform, an object platform, a plurality of sensor networksub-platforms and service sub-platforms; the object platform includes agas meter; and the service sub-platforms include at least one of a gascompany service sub-platform, a government service sub-platform or asocial operator service sub-platform. The gas leakage detection methodbased on the compound IoT includes: the user platform sends a detectioncommand to a service sub-platform, where the detection command includesa time period; the service sub-platform sends the detection command tothe management platform; the management platform sends a detectioninstruction to the gas meter via at least one of the plurality of sensornetwork sub-platforms according to the detection command; the gas metersends, in response to the detection instruction, gas data to themanagement platform via the sensor network sub-platform at a preset timeinterval within the time period; the management platform judges whetherthe gas data uploaded by the gas meter changes or not; when the gas datachanges, the management platform judges whether to send a valve closinginstruction to the gas meter via at least one of the plurality of sensornetwork sub-platforms; and when receiving the valve closing instruction,the gas meter closes a valve in response to the valve closinginstruction. According to the gas leakage detection method based on thecompound IoT and the IoT system provided by the present invention,whether a gas pipeline of a user has gas leakage or not is remotelymonitored and is judged via a user participation manner, the judgmentmanner is intelligent, the judgment result is accurate and thus the gassafety of the user is guaranteed.

The above are merely preferred embodiments of the present invention, andare not intended to limit the present invention. A person skilled in theart may make various modifications and changes to the present invention.Any modification, equivalent replacement, improvement and the like madewithin the spirit and principle of the present invention all shall beincluded in a scope of protection of the present invention. It should benoted that similar reference numerals and letters refer to similar itemsin the following drawings, and thus once an item is defined in onedrawing, it does not need to be further defined and explained in thesubsequent drawings.

What is claimed is:
 1. A gas leakage detection method based on acompound Internet of Things (IoT) that includes multiple devicesconnected wirelessly via the Internet, wherein the method is applied toan IoT system; the IoT system comprises a user platform, a managementplatform, an object platform, a plurality of sensor networksub-platforms and service sub-platforms; the object platform comprises agas meter; the service sub-platforms comprise at least one of a gascompany service sub-platform, a government service sub-platform or asocial operator service sub-platform; and the method comprises: sending,by the user platform, a detection command to a service sub-platform,wherein the detection command comprises a time period; sending, by theservice sub-platform, the detection command to the management platform;sending, by the management platform, a detection instruction to the gasmeter via at least one of the plurality of sensor network sub-platformsaccording to the detection command; in response to the detectioninstruction, sending, by the gas meter, gas usage data to the managementplatform via the sensor network sub-platforms at a preset time intervalwithin the time period; judging, by the management platform, whether thegas usage data uploaded by the gas meter changes or not during the timeperiod, and when the gas usage data changes, judging, by the managementplatform, whether to send a valve closing instruction to the gas meteror not via at least one of the plurality of sensor networksub-platforms; and when receiving the valve closing instruction,closing, by the gas meter, a valve in response to the valve closinginstruction; wherein the service sub-platforms comprise at least the gascompany service sub-platform and the social operator servicesub-platform; and the step of when the gas usage data changes, judging,by the management platform, whether to send a valve closing instructionto the gas meter or not via at least one of the plurality of sensornetwork sub-platforms comprises: when the time at which the gas usagedata changes falls within a preset time range, sending, by themanagement platform, the valve closing instruction to the gas meter viaat least one of the plurality of sensor network sub-platforms; andsending, by the management platform, prompt information to both the gascompany service sub-platform and the social operator servicesub-platform.
 2. The gas leakage detection method based on the compoundIoT according to claim 1, wherein the service sub-platforms comprise atleast the gas company service sub-platform and the social operatorservice sub-platform; and the step of judging, by the managementplatform, whether to send a valve closing instruction to the gas meteror not via at least one of the plurality of sensor network sub-platformscomprises: judging, by the management platform, whether or not theamount of change in the gas usage data is greater than a presetthreshold; if the amount of change in the gas usage data is smaller thanthe threshold, sending, by the management platform, query information tothe user platform via a service sub-platform to query whether a userintentionally consumed any gas, and judging, according to a response ofthe user platform to the query information, whether to send the valveclosing instruction to the gas meter or not via at least one of theplurality of sensor network sub-platforms; if the amount of change inthe gas usage data is greater than the threshold, sending, by themanagement platform, the valve closing instruction to the gas meter viaat least one of the plurality of sensor network sub-platforms; and whenthe management platform sends the valve closing instruction to the gasmeter via at least one of the plurality of sensor network sub-platforms,sending, by the management platform, the prompt information to both thegas company service sub-platform and the social operator servicesub-platform.
 3. The gas leakage detection method based on the compoundIoT according to claim 2, wherein when the response of the user platformto the query information indicates that no gas was intentionallyconsumed by the user, the management platform sends the valve closinginstruction to the gas meter via at least one of the plurality of sensornetwork sub-platforms.
 4. The gas leakage detection method based on thecompound IoT according to claim 2, wherein if the user platform does notmake a response to the query information within a preset duration, themanagement platform sends the valve closing instruction to the gas metervia at least one of the plurality of sensor network sub-platforms. 5.The gas leakage detection method based on the compound IoT according toclaim 1, wherein the service sub-platforms comprise at least the gascompany service sub-platform and the social operator servicesub-platform; and the step of judging, by the management platform,whether to send a valve closing instruction to the gas meter or not viaat least one of the plurality of sensor network sub-platforms comprises:judging, by the management platform, whether the change of the gas usagedata continues or not within a preset observation duration; if thechange of the gas usage data continues, sending, by the managementplatform, the valve closing instruction to the gas meter via at leastone of the plurality of sensor network sub-platforms; and sending, bythe management platform, the prompt information to both the gas companyservice sub-platform and the social operator service sub-platform. 6.The gas leakage detection method based on the compound IoT according toclaim 5, wherein if the change of the gas usage data of the gas meterstops within the preset observation duration, the management platformdoes not send the valve closing instruction.
 7. An Internet of Things(IoT) system that includes multiple devices connected wirelessly via theInternet, wherein the IoT system comprises a user platform, a managementplatform, an object platform, a plurality of sensor networksub-platforms and service sub-platforms; the object platform iscommunicatively connected with the management platform via at least oneof the plurality of sensor network sub-platforms; the managementplatform is communicatively connected with the service sub-platforms;the service sub-platforms are communicatively connected with the userplatform; the object platform comprises a gas meter; and the servicesub-platforms comprise at least one of a gas company servicesub-platform, a government service sub-platform or a social operatorservice sub-platform, wherein: the user platform is configured to send adetection command to a service sub-platform, wherein the detectioncommand comprises a time period; each of the service sub-platforms isconfigured to send the detection command to the management platform; themanagement platform is configured to send a detection instruction to thegas meter via at least one of the plurality of sensor networksub-platforms according to the detection command; the gas meter isconfigured to send, in response to the detection instruction, gas usagedata to the management platform via the sensor network sub-platforms ata preset time interval within the time period; the management platformis configured to judge whether the gas usage data uploaded by the gasmeter changes or not during the time period, and when the gas usage datachanges, the management platform judges whether to send a valve closinginstruction to the gas meter or not via at least one of the plurality ofsensor network sub-platforms; and when receiving the valve closinginstruction, the gas meter closes a valve in response to the valveclosing instruction; wherein the service sub-platforms comprise at leastthe gas company service sub-platform and the social operator servicesub-platform, and when the time at which the gas usage data changesfalls within a preset time range, the management platform sends thevalve closing instruction to the gas meter via at least one of theplurality of sensor network sub-platforms, and the management platformsends prompt information to both the gas company service sub-platformand the social operator service sub-platform.
 8. The IoT systemaccording to claim 7, wherein the service sub-platforms comprise atleast the gas company service sub-platform and the social operatorservice sub-platform; and that the management platform judges whether tosend a valve closing instruction to the gas meter or not via at leastone of the plurality of sensor network sub-platforms comprises: themanagement platform judges whether or not the amount of change in thegas usage data is greater than a preset threshold; if the amount ofchange in the gas usage data is smaller than the threshold, themanagement platform sends query information to the user platform via aservice sub-platform to query whether a user intentionally consumed anygas, and judges, according to a response of the user platform to thequery information, whether to send the valve closing instruction to thegas meter or not via at least one of the plurality of sensor networksub-platforms; if the amount of change in the gas usage data is greaterthan the threshold, the management platform sends the valve closinginstruction to the gas meter via at least one of the plurality of sensornetwork sub-platforms; and when the management platform sends the valveclosing instruction to the gas meter via at least one of the pluralityof sensor network sub-platforms, the management platform sends theprompt information to both the gas company service sub-platform and thesocial operator service sub-platform.
 9. The IoT system according toclaim 8, wherein when the response of the user platform to the queryinformation indicates that no gas was intentionally consumed by theuser, the management platform sends the valve closing instruction to thegas meter via at least one of the plurality of sensor networksub-platforms.
 10. The IoT system according to claim 8, wherein if theuser platform does not make a response to the query information within apreset duration, the management platform sends the valve closinginstruction to the gas meter via at least one of the plurality of sensornetwork sub-platforms.
 11. The IoT system according to claim 7, whereinthe service sub-platforms comprise at least the gas company servicesub-platform and the social operator service sub-platform; and that themanagement platform judges whether to send a valve closing instructionto the gas meter or not via at least one of the plurality of sensornetwork sub-platforms comprises: the management platform judges whetherthe change of the gas usage data of the gas meter continues or notwithin a preset observation duration; if the change of the gas usagedata of the gas meter continues, the management platform sends the valveclosing instruction to the gas meter via at least one of the pluralityof sensor network sub-platforms; and the management platform sends theprompt information to both the gas company service sub-platform and thesocial operator service sub-platform.
 12. The IoT system according toclaim 11, wherein if the change of the gas usage data of the gas meterstops within the preset observation duration, the management platformdoes not send the valve closing instruction.